:root {
  --page: #170a2b;
  --surface: #100823;
  --surface-raised: #17102e;
  --surface-glass: color-mix(in srgb, var(--surface-raised) 72%, transparent);
  --text: #fdfdfd;
  --muted: color-mix(in srgb, var(--text) 62%, transparent);
  --accent: #6cf3a3;
  --accent-ink: #100823;
  --accent-alt: #c4b5fd;
  --line: color-mix(in srgb, var(--text) 16%, transparent);
  --glow: #6cf3a3;
  --radius: 14px;
  --radius-lg: 20px;
  --section-space: clamp(4rem, 7vw, 6.5rem);
  --rail-width: clamp(220px, 18vw, 280px);
  --content-max: 1680px;
  --font-display: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  line-height: 1.65;
  font-family: var(--font-body);
  background: var(--page);
  color: var(--text);
  background-image:
    radial-gradient(1200px 700px at 0% 0%, color-mix(in srgb, var(--accent-alt) 14%, transparent), transparent 55%),
    radial-gradient(900px 600px at 100% 20%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 50%),
    linear-gradient(180deg, var(--page), color-mix(in srgb, var(--surface) 40%, var(--page)));
}

body,
button,
input,
select,
textarea {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg,
video,
canvas,
iframe {
  display: block;
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: -0.022em;
}

h1 {
  font-size: clamp(2.2rem, 4.8vw, 4.6rem);
  line-height: 1.02;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.75rem, 3.2vw, 3rem);
  line-height: 1.08;
  margin-bottom: 0.85rem;
}

h3 {
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.25;
}

p {
  color: var(--muted);
}

.page-frame {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  min-height: 100vh;
  max-width: 2160px;
  margin: 0 auto;
}

.site-rail {
  position: sticky;
  top: 0;
  align-self: start;
  min-height: 100vh;
  padding: clamp(1rem, 2vw, 1.75rem);
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(18px);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 40;
}

.rail-brand-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.brand {
  display: grid;
  gap: 0.15rem;
  min-width: 0;
  font-weight: 800;
  font-size: 1rem;
}

.brand-logo {
  width: 56px;
  height: 56px;
  max-width: 64px;
  max-height: 64px;
  flex: 0 0 auto;
  border-radius: calc(var(--radius) - 2px);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface-raised);
}

.brand-logo svg {
  width: 100%;
  height: 100%;
}

.brand small {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--muted);
  font-family: var(--font-mono);
}

.site-rail nav {
  display: grid;
  gap: 0.35rem;
}

.site-rail nav a {
  display: flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--muted);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.site-rail nav a:hover {
  color: var(--text);
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface-raised) 80%, transparent);
}

.rail-cta-wrap {
  margin-top: auto;
  padding-top: 1rem;
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.75rem 1.2rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.site-rail .header-cta {
  width: 100%;
}

.header-cta,
.button-primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.button-secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.button-primary:hover,
.header-cta:hover {
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 40%, transparent), 0 12px 32px color-mix(in srgb, var(--accent) 22%, transparent);
}

.page-main {
  min-width: 0;
}

main {
  display: grid;
  gap: 0;
}

.section-inner {
  width: min(calc(100% - clamp(1.5rem, 4vw, 4rem)), calc(var(--content-max) - var(--rail-width)));
  margin: 0 auto;
}

.hero {
  padding: clamp(2rem, 5vw, 4.5rem) 0 var(--section-space);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.hero-copy {
  min-width: 0;
}

.eyebrow,
.section-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--accent);
}

.lead {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  max-width: 42rem;
  color: color-mix(in srgb, var(--text) 78%, transparent);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.75rem 0 1rem;
}

.geo-line {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.hero-visual {
  overflow: hidden;
  width: 100%;
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  background: var(--surface-raised);
  box-shadow:
    inset 0 1px 0 color-mix(in srgb, var(--text) 8%, transparent),
    0 24px 64px color-mix(in srgb, var(--page) 50%, transparent);
}

.hero-visual svg {
  width: 100%;
  height: 100%;
}

.section {
  padding: var(--section-space) 0;
  border-top: 1px solid var(--line);
}

.section:nth-of-type(even) {
  background: color-mix(in srgb, var(--surface) 55%, transparent);
}

.section-heading {
  max-width: 48rem;
  margin-bottom: 2rem;
}

.section-heading > p {
  font-size: 1.02rem;
}

.fact-disclaimer {
  font-size: 0.78rem !important;
  padding: 0.7rem 0.85rem;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  min-width: 0;
  padding: 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.card:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  transform: translateY(-2px);
}

.card p {
  margin-bottom: 0;
}

.card-icon,
.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 0.85rem;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-radius: calc(var(--radius) - 2px);
}

.card-icon svg,
.step-icon svg {
  width: 26px;
  height: 26px;
}

.icon-draw path {
  stroke-dasharray: 34 8;
  animation: iconDraw 12s linear infinite;
}

.icon-pulse {
  transform-box: fill-box;
  transform-origin: center;
  animation: iconPulse 12s ease-in-out infinite;
}

.icon-slide {
  animation: iconSlide 12s ease-in-out infinite;
}

.icon-spin {
  transform-box: fill-box;
  transform-origin: center;
  animation: iconSpin 14s linear infinite;
}

@keyframes iconDraw {
  to {
    stroke-dashoffset: -84;
  }
}

@keyframes iconPulse {
  50% {
    transform: scale(0.9);
    opacity: 0.75;
  }
}

@keyframes iconSlide {
  50% {
    transform: translateX(3px);
  }
}

@keyframes iconSpin {
  to {
    transform: rotate(360deg);
  }
}

.card-label {
  display: block;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.65rem;
}

.card-value {
  display: block;
  margin-top: 0.85rem;
  color: var(--accent);
  font-size: 1.05rem;
}

.card small {
  display: block;
  color: var(--muted);
  margin-top: 0.35rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.stat {
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--surface-glass);
}

.stat strong {
  display: block;
  font-size: 2rem;
  font-family: var(--font-mono);
  color: var(--accent);
}

.stat span {
  font-weight: 700;
}

.stat p {
  font-size: 0.82rem;
  margin: 0.45rem 0 0;
}

.process-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.85rem;
}

.process-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--surface-glass);
  position: relative;
}

.process-list li::before {
  content: "";
  position: absolute;
  left: 2.1rem;
  top: calc(100% - 0.4rem);
  width: 2px;
  height: 0.85rem;
  background: color-mix(in srgb, var(--accent) 35%, transparent);
}

.process-list li:last-child::before {
  display: none;
}

.step-icon {
  margin-bottom: 0;
}

.geo-chips {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.geo-chip {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-glass);
}

.geo-chip strong,
.geo-chip span {
  display: block;
}

.geo-chip span {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.35rem;
}

.guide-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  min-width: 0;
}

.chapter {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-glass);
}

.chapter li {
  color: var(--muted);
  margin: 0.45rem 0;
}

.faq-list {
  max-width: 56rem;
  display: grid;
  gap: 0.5rem;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  background: var(--surface-glass);
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
}

.faq-list p {
  padding-right: 1rem;
  margin-bottom: 0;
}

.contact-grid,
.calculator-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.contact-form,
.calculator-form {
  display: grid;
  gap: 0.85rem;
  background: var(--surface-raised);
  padding: 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
}

.contact-form label,
.calculator-form label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
}

input,
select,
textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--page);
  color: var(--text);
  padding: 0.8rem 0.85rem;
  border-radius: calc(var(--radius) - 2px);
}

textarea {
  min-height: 110px;
  resize: vertical;
}

output {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 800;
  font-family: var(--font-mono);
}

.form-message {
  color: var(--accent);
  margin: 0;
}

.component-calculator .section-inner {
  padding: clamp(1.25rem, 3vw, 2rem);
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  background: color-mix(in srgb, var(--surface-raised) 90%, var(--page));
}

.site-footer {
  padding: 3.5rem 0 4rem;
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
}

.footer-brand {
  font-size: 1.35rem;
}

.site-footer a {
  display: block;
  color: var(--muted);
  margin: 0.35rem 0;
}

.site-footer a:hover {
  color: var(--accent);
}

@media (max-width: 1100px) {
  .page-frame {
    grid-template-columns: 1fr;
  }

  .site-rail {
    position: relative;
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
  }

  .rail-brand-row {
    flex: 1 1 220px;
  }

  .site-rail nav {
    flex: 1 1 100%;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .rail-cta-wrap {
    margin-top: 0;
    padding-top: 0;
    flex: 0 0 auto;
  }

  .site-rail .header-cta {
    width: auto;
  }

  .hero-grid,
  .contact-grid,
  .calculator-grid {
    grid-template-columns: 1fr;
  }

  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stats-grid,
  .geo-chips {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .guide-body {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-rail nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-inner {
    width: min(calc(100% - 1.5rem), 100%);
  }

  .cards-grid,
  .stats-grid,
  .geo-chips,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .card-icon,
  .step-icon,
  .card-icon svg,
  .step-icon svg,
  .card-icon path,
  .step-icon path,
  .card {
    animation: none !important;
    transition: none !important;
  }
}